06 2.5T Intake Pop and Turbo Flutter Topic is solved

[06blue25]

Trying to get an 06 2.5T that's been sitting, running again. PCV glove test made it a balloon at idle.

New: ETM (the reason it was parked).
Coils and Plugs
Battery

The throttle was unresponsive when parked. ETM fixed that, but now idle is extremely rough and has popping noises from intake.

Turbo is also constantly fluttering at idle.

Under slight throttle input or AC turned on, idle and flutter are more smooth (less lumpy) but still not right.

No CEL. As it hasn't hit the road yet. Only a few minutes idling.

Can all this be PCV?

[jonesg]

it needs a complete pcv job or you'll be doing the cam seals too.

[06blue25]

Ordering PCV for sure, but wondering if the flutter is related or tcv or cbv might be the cause there.

It didn't do any of this when originally parked. The ETM and sway bar bushings caused me to set it aside until my next kid driver became of age. I can understand why the hardened gunk would make PCV so much more problematic with idle, but the flutters and pops ...

[jonesg]

the engine needs healthy vacuum to run properly.
now it runs with positive pressure , but not well.

[TisMe]

Try not to engage the turbo until you get that PCV taken care of.

I feel like that sputter could be related to a dirty intake, but I'm still a novice in these things. Refresh your fuel injectors when you have the rail off during PCV service. It's not unlikely doing a real nice combover during intake dissection will solve your woes.

[06blue25]

I'll grab a better vid after PCV. If it's still happening. It sounds like sputter in vid, but it's fluttering air coming through intake filter. Filter is fresh out of the box as well. Forgot that in the list.

[TisMe]

Search for threads along the lines of “hunting idle” and see if anything correlates. I’d jump into research out of curiosity but I’m short on time tonight.

“Idle flare” as well.

[Krons]

While doing the PCV give the throttle body a good cleaning. A possibility carbon buildup could have it sticking, especially with a lack of proper vacuum.

[06blue25]

Appreciate the insights here. It was painfully obvious what was the cause.... when I flipped over the intake after unbolting banjo....

Teaching a teenager to wrench got frustrating and I failed to notice a massive gap in the TB to intake manifold. PCV needed done. As it was definitely clogged up, but all the other strangeness was TB mounted wrong.

New shoes Weds. Fix up heavy steering, flush brakes, swap out oil after a couple hundred. Then, figure out what to do about nasty sway bar clunk. Think I'm too old for that without a lift.